Machine for grinding milling-cutters or similar tools.



l P. A. KUSTNEP.. MACHINE FOR GRINDING MILLING GUTTERS OR SIMILAR TOOLS.

APLIOATION FILED JAN. 2, 1908.

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P. A. KUsTlxmR.v L MACHINE POR GRINDING MILLING GUTTERS 0R SIMILAR TOOLS.

1 Patented oct.12,19o9.

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Application filed. January 1963.' Serial c. @$9,933.

To all whom it may concern.

Pfc it known that I. linnnn Ancien KUST- NER, a citizen of the Republic ci fiwitzer`- land, residing` et Geneva., in the Republic of Switzerland. lieve invented a certain new and useful linproved Machine 4for Grinding' Milling-Cutters or Siniilar'r'lfools. 'of which the following is aepecication.

This invention relates to a'n improved nin chine for .qrrinding1 millingcutters or rsimilar tools, the object beine; to provide a machine `@artcu-lady applicable for 2grinding milling cutters or other tools having cutting surfaces regularly- Spaced on n circle.

The accompanying drawingillnstrates by Way' of example a machine in accordance with the invention.

Figure l is a side elevation of the niechine. Fig. 2 aplan; Figs. 3 to 6 are detail views of the machine during the process oi operation.

ln the drawing', a a stand which snp ports e spindle o which `carries an emery Wheel b1 (not shown in Fig. 2) and :i pulleybz which receives a beltl for revolving the emery Wheel. The stand ,c isalso lit-ted with a projection al on which a slide c moves. This slide may be traversed along; the projection al by means of a lever d placed on the stand. and provided With a handle not shown on the drawing. The

traverse ofthe slide c by the lever (Z is effectH E .ed hy e sliding block c1 carried by the slide c and Working' in the slot d1 of the lever d. @n the slide c a rotary circular tablef swivels on a pivot e. The fable fis provided with stops j" placed et equal distances apart, which catch thecnd of e pawl f1, pivoted on the stand c. This pawl is kent in its normal position of rest, as shown in Fig. 2 by a spring g1, acting on an arm g2 ci the pawl, which it tends to keep'pressed against a lined stop g3. 0n the edge of the table are cut a number of notches f2 at equal distances apart, into which can be inserted the end of a stop rod ii, which slides in a. support earred by the slide c. The rod h is subjected to the action of a spring h1, tending to push its end against the edge of the table f, and

carries e bracket h2 upon which is placed e lever k3. The lever h3 has at one end e roller if which relis on a fixed guide h5 carried by the stand a. rlhe lever las has et its other ende spring la. which tends to brine; its Second erin in Contact with e stop .lf carried f1, revolves the table f until the roller lresting against the edge of the table f,

' bj! the brochet, The slide is Shown on the drawing in the niiddleo't ver al moving in the dit ion of the. arrow shown in Fig. 2, lt the e kept. nieving in the direction. of the nrrow, the slide c '-i continues its niotioii nini-l it etrilees against the. etop Screw i shown in a brechet fixed to the stand e. During this in otion the roller reaches e tapered p. tion oi the cuide if, which allows the npr ne' it@ to bring the tree end ci the level1 it to resi; against the stop fz?. The lever ,if being then moved in the oppoeite directionthe roller .if strikes against the guide Il xend causes the with drewalio the. rod la, the extremity of which lentes the notch f2 in which: it. rested. 'ihe end of the pawl fj, acting on one of the et ce clear of the guide a, when the rod. h, nl. l'. lle into the. next notch f2 to that. 1which it hns just left. The rod i then iXes the table t in position and the pavvl g stops the travel of the Slide c which is ready for another fon werd motion.

On the table f is fitted a, rotary rest swiveling on the saine pvot c as the table i". 'lf he rest ic is connected to the 'table f by en elastic coupling consisting of pins f3 fitted in the table f and 'working in slote /cl of the E llf, in which are placed springs 'lfhe upper part of the rest is formed es a socket having an, internal thread, into which is screwed a tool-holder l. The upper part of the holder cylindrical, for recoin/ingl the niiliing cutter or other tool to be ground, and is hollow und split like a spring mendrelv to forni several parallel bledee Z1. il screw fm, is placed on the end of the toolholder and has e conical neck fitting in a hollow 'of corresponding sha-pe in the tool holder. By tightening up the screw m proper adjustment is given to the bledes Z1 nndat-.the saine time the milling"cntter is tightened on the tool-holder- 0n the edge of the rotary rest Il: are cnt a series of notches f et equal distances apart., the flanks of which are inclined and which correspond to the number of the notches ,t2 and of the stops f1. These notches coper ate with a Stop ma -einstI which their inclined flanks strikeat the end of the travel of the slide c. The stop 'n is formed by .the end ofi a rod Sliding in the bracket 0 fixed on the and a'. Vlhie rod is connected by e flange ai te a sert-miaE fastened in the bracket o and.l ending with a knob by means of which the stop fri 1s fed forward or withdrawn as required. The position of the latter is moreover arranged sofasto give, during the vlatter part ot' the motion, in front of the slide a,

a rotary motion to the rest k in the'same direction as the rotary motion given to this table f, by acting on one of. the faces o the .notches ist,

A milling cutter p having thesamenuinber of teeth as there are stops f1 and notches f2' and ist, being iixed on the toollholder 1n position as shown in thedrawing, the Way to A proceed is as follows,-viz :f-The lever d being moved in the direction of the arrow the slide c advances. Just before 1t finishes its travel, the fend of the stop n comes in contact with the edge of the left iiclnedfianir of the notch /cA opposite' the stop, as shownin Fig.'

3. liig. Ll shows the corresponding lposition ofthe niilliiig\cutter p with respect to thel position or the milling cutter with respect to the emeiy Wheel. W hen the lever d is pulled back, the .cutter on which the emery v vheel has been tvcrlring commences to nive from the latter owing to the slight backward motion givenhy the springs /cZ to the rest lc, the slide c then makes'its return motion While y thetahle lf ,the rest /c and thel cutter receive apforvvardmcticn as explained above The machine is new ready for grinding the face of they nent ttrcth of the cutter. .By means of the screr i, the action of the Wheel on the cuttercan he regulated with the utmost precision; moreover the face of the cutter to he ground being `brought iii contact with the -erriery Wheei arthcravvay from-.the cutter in a direction almost: perpendicular to the movement of the'slide c.

By changing the position of screws Z and vwoi'rlr'ing surface of the emery'wheel, through the rotary movements of the-rest lc,- the face of the cutter isI ground much better and the cutting edges are made much sharper than if the cutter were moved to andfro by the n the machine be arranged for grinding cutters of different diameters.

seems `inclined Hanks, and au adjustable -stop acting on said H.f` nks.

2. In a machine for grinding milling cutters or similar tools,'the combination of a reciprocating slide, a spring controlled rotary rest, an adjustable stop, a table, and

means or imparting rotary motion to s aid table at each return of said reciprocating slide.

3. `In a machine for rindinor milling cul lters or similar tools, t o combination of a reciprocatingslide, a spring controlled rotary rest having notches rovided with inclined Hanks, an adjustab e stop acting on said Hanks, a table, and means for imparting a predetermined rotary motion to said table at each return of said reciprocating slide.

4. In a machine for grinding milling cutters or similar tools, the combination of a reciprocating slide, a spring controlled rotary rest having notches rovided with inclined Hanks, an adjustablle stop acting on said Hanks, a table, means for imparting it predetermined rotary motion to said table at each returnof said reciprocutiniJ slide, and a spring-like expandible tool hoi er.

` .5. In a -machine for grinding milling cutters or similar tools, the combination o' a regiprocating slide, a spring controlled rotagy rest having notches provided with inclined Hanks, an adjustable stop acting on said' Hanks, a table, means for impartinfr a predetermined rotary motion to said tsilile at each return of said reciprocating' slide, anda spring like tool holder having a liol low c lindrical portion which is split and provi ed with means for effecting its cxpansion and the tightening of the tool thereon.

In testimony whereof I aHiX my signature -in presence of two Witnesses.

PIERRE ADRIEN vKUSTNER.`

Witnesses:

L. H. MUNIER, l R. DE VVURSTEMBERGER. 

